Well, ironically CRT has less blur than LCD in practice unless you only ever look at still images. Both strain my eyes but CRTs would have much better focus by now if they kept on being developed. And as I said and you didn't understand, flicker on CRTs can be reduced by increasing to whatever rate you want, even 200Hz (although 85Hz should be enough) on a cheap 1999 model I have, and most LEDs in light bulbs and absolutely any appliance etc are already flickering at 120Hz at most, so you're basically just picking and choosing what things you think affect you.